Type-writing machine.



Patented Jan. 19, 1909.

luvzu-run: JOHN C. Ni -LAUGH LIN.

WITN 55555 ATTDRNEY.

UNITED STATES PATEN T OFFICE.

JOHN G. MCLAUGHLIN, OF JERSEY CITY, NEW JERSEY, ASSIGNOR TO- UNDERWOOD TYPE- WRITE-R COMPANY, OF NEW YORK, N.

.Y., -A CORPORATION OF NEW JERSEY.

TYPE -WRITIN G MACHINE Specification of Letters Patent.

] Patented Jan. 19, 1909.

Application filed November 8, 1907. Serial No. 401,197.

I sey City, in the county of Hudson and State of New Jersey, have invented certain new and useful Im rovements in Type-Writing Machines, of w ich the following is a speci fication.

This invention relates to tabulating mechanisms of the kind known as decimal tabulators, in which separate denomination keys are provided, one for each denomination or punctuation point.

Itis usual in typewriting machines provided with decimal tabulating mechanism, to provide a set of denomination keys, one for each denomination, and also including keys for the commas or spaces intervening between the different denominational groups, that is, between hundreds and thousands, and also between hundreds of thousands and millions. This arrangement is found to be suitable for general purposes; but in some cases it is necessary to use larger denominations than the keys are intended for, and it is found impracticable to use the mechanism for that purpose.

One of the main objects of my invention is to render it practicable to employ the usual set of denomination keys and their connected stops for the purpose of securing a reater range of denominations, when desire By omitting the punctuation marks or spaces between the denominational groups, two or three more fi ures can be written in their roper places y theuse of the denomination eys. There needs to be no change made in the denomination stops in order to get the greater range of operation, but I have contrived'to use those stops either for a low range of work in which use is made of the punctuation points, or for a higher range of work in, which the punctuation'points are omitted. {4

In carrying out iny invention, I employ reversible finger keys for the higher denominations, each key having different charace ters on its opposite faces or indexes, so that by reversing all the keys, the mechanism may be used for either the short or the lon range of denominations. The first four keys are used respectively for decimal point units,-

tens and hundreds, under all circumstances, these keys being not reversible. The remaining keys are reversible,-the first one having on one face a comma or blank to provide for av punctuation point or space between hundreds and thousands. On its opposite side, this key bears the character for thousands; and so on throu h the remaining keys. Each of the reversible keys is preferably mounted upon its lever by means of a holder which may be lifted to release the key .and permit its rotation, and then depressed to secure the key on its seat on the lever.

manufacturer to furnish av taloulator for either a high or low range of work, as desired, and at anytime, by a simple manipulation, the mechanism may be adapted forthe other range.

In the accompanying draWinga'Figure 1 shows in perspective a group of the, parts which make up my improved reversible tabulating key. Fig. 2 1s a fragment of the front end of a key bearing lever. Fig. 3 is a diagrammatic elevation of a key bearing lever and a denomination stop operated thereby. Fig. 4 is 'a group of views illus trating the details of construction of the denomination key. 5 is a rear view of a strap or clip to fit over the front end of the key lever and having a yoke in which the key to be swiveled. Fig. 6 illustrates the method of releasing the key to permit it to turn over. Fig. 7 1s a sectional view of the front part of the lever and its appurtenances. Fig. 8 is a perspective view of-the parts seen at Fig. 7. Fig. 9 is a diagram of aset of key-bearing denomination stop levers, four of the keys being of the ordinary type, and the remaining keys being reversible;-the same being-shown as adapted for a short ran e of work. Beneath the reversible keys, show the respective denominational characters which are provided on their under 'faces, and it willbe understood that by simply turning thekeysovei', these characters Wlll be brought uppermost, and the mechanism will then be adapted for a greaterrange of work. I Denomination keys arecarried upon the "front ends of levers 1 pivoted at2, and carrying at their rear ends upstanding thrust rods 3, upon the topof each of which is with a column stop 5 mounted upon the usual bar 6 of a travelin carriage. m I present improvements re ate to the keys, it

formed a denomination stop. 4 to cooperate By this means, it becomes practicable for a will be understood that any kind of stop mechanism may be employedj and it is not essential that the. keys be mounted upon levers. The first four keys of the group,

designated as'7, and bearing the characters from decimal point to 100, inclusive, are

ordinary keys and secured in the ordinary manner u on the levers. The next key, designate as 8, is reversible, being for this purpose swiveled by pivots 9 within a yoke 10extending up from a sheet metal clip 11 folded at 11, clasping the front end of'a lever 1. 'Inthe front part of the latter isprovided a'vert'ical slot 12, through which extend rivets 13 from the sides of the clip,

whereby the latter is guided in an upward movement to release the key, 6, the slot 12 extending up into the stem portion I 14- of' the lever sufiiciently high to permit the key to swmg over, as shown in dotted lines. When the key has been turned, it is pushed down into a seat 15 formed on front and rear projections 16 on said stem 14, the key being then heldfirmly down upon said i seat by means of a pair of'spring' fingers 17 formed u on the rear end of the clip 'to em- 7 brace an press against the sides of'the lever 1. Thus it will be seen that by a simple operation, the six right hand keys in the top row at Fig. 9, numbered respectively, 8, 18,

'19, 20, 21, and 22, may be reversed to bring uppermost the faces shown in the bottom row in said figure, whereby the capacity of the keyboard is changed from 1,000,000 to Each of the reversible keys .may consist of a disk like body portion 23 having recesses 24,- 25 in its top and bottom faces, in which respectively fit character-bearing celluloid or paper disks 26', 27, which are held in place b annular caps 28, 29 forced over the edges 0% the body 23, and having internal flanges '30 to retain the disks. On the opposite sides of, the body are formed pivot-ho es 31 to receive the gudgeons 9, whereby the key is swiveled in the yoke 10. I

Having thus described my invention, I,

' claim: I

1. The combination with a lever or the like, of a-reversible key, which is mounted upon a holder which 066 erates with the lever to secure the key, sai ,ho lder movable 'awa from the lever to release said key from the ever and ermitthe reversal of the key. 2. The com ination'with a lever or the like, of a reversible ;key which is mounted u on a holder which is movable away from t e lever to release said key to permit its reversal, said holder comprising a yoke in which the keyis swiveled, and means for relike, of a reversible tabulating-denomination; key, which is mounted u on a holder which isjrmovable .a'way f ronit e lever to release I tai'm'n the yoke in a position to lock the key to the ever. -11 I 3. The combination withia lever or the said key to permit its reversal, said holder comprising a yoke in which the key is'swiveled and astem portion mounted to move up 7 1 and down on the lever, and means for yie ingly retaining the holder in its depressed position, to clip the key to the lever.

4. The combination with a'key lever, of a reversible key, ayoke in which the key is swiveled, a strap 11 on which-said yoke is I formed, and a key ever embraced by said strap, said key lever having a seat for the I key, and means being provided for detaining the strap in its depressed position, with the key restmg upon said seat.

I 5 The combination with alever, of a strap folded over the end of the lever and having arms to iorm a yoke, a reversible key swiveled in said yoke, a seat for said key-being formed upon said lever,.and means to guide the strap in an up and down movement upon said lever to release the key for reversal, and then to reseat the'key. I

6. Th combination with a lever, of a strap arms to form a' yoke, a reversible key swiveled in said yoke, a seat for said key being formed upon said lever, means toguide the strap in an u said lever to re ease the key for reversal, and then to reseat the, key, and means being proposition.

folded over the end of the lever' and having and down movement upon 'vided for detaining thestrap in its depressed 7. .The combination with a lever, of a strap the key lever below said seat and means upon the strap to engage said slot.

8. A system of keys for a denomination- 1 selecting mechanism including a series of unchanging keys for denominatlons u to and including hundreds, and a series 0 changeable keys for higher denominations; one set of faces or indexes of the changeable keys including unctuation marks or spaces to separate t e hundreds from the thousands roup and to separate the latter from the milions group, and separating spaces or marks .I being omitted from the other set of faces or indekes, the latter having. a correspondingly greater range of denominations. I

9. A reversible key comprising a disk-like body recessed on its top and bottom faces,

disks fitting within said recesses and bearing Y different denominational characters, and annular caps fitting over the top and bottom edges of, the body and confining said disks;

saidbody having a pivot or bearing upon which it may turn.

'10. The combination with a set of unchangeable denomination sto s, of a set of denomination keys conneete to said stops to operate the same, certain of said keys bearing' changeable v indices' or Characters to en-' able each oftheir connected stops to serve fordift'erent denominations, or for; alternate punctuation and denomination, and thereby to enable the entire set of keys and stops to serve for alternate systems of tabulation. 

